for hydrocarbons

OPEN ROUND COLOMBIA 2010 CAUCA-PATIA AREA January, 2010

Cauca-Patía Basin. Generalities

Cauca-Patía blocks BLOCKSACRES CAUCA CAUCA CAUCA CAUCA CAUCA CAUCA CAUCA

Oil and gas infrastructure

2D Seismic lines (about 1000 km) Cauca 3 Cauca 4 Cauca 6 Cauca 7

Seismic lines and Wells PERFORATED WELLS TOTAL DEEP (ft) CANDELARIA ' JUGA ' PATACORE ' SALSA ' BEREJÚ ' *About 1000 km of seismic lines. SEISMIC PROGRAMS PROGRAMSLINES CAUCA-PATÍA-9011 PATÍA -817 VALLE DEL CAUCA VALLE DEL CAUCA-809

Stratigraphy

Candelaria-1 well

Possible source rocks

Van Krevelen Diagram Geochemical data suggest the presence of source rocks with type II and III kerogens. The maturity varies mostly from mature to overmature. %TOC > 1 and Hydrogen Index > 300 mgHC/gTOC

Sub-Basin Cauca Traps Units wedging against the basement Lateral closures against normal and inverse faults. Top of Late Miocene-Pliocene (?) interval (D1) Top of Late Eocene-Middle Miocene Interval (D2) VC LINE

Sub-Basin Cauca Traps Seismic expression of the plays VC LINE Lateral closures against normal and inverse faults. Top of Late Miocene-Pliocene (?) interval (D1) Top of Late Eocene-Middle Miocene Interval (D2)

Sub-Basin Patía Traps CP LINE Middle-upper disconformity to the base of the Esmita Formation (D3). Top of Middle Eocene interval (D4). Fault propagation folds

Sub-Basin Patía Traps CP LÍNE Middle-upper disconformity to the base of the Esmita Formation (D3). Top of Middle Eocene interval (D4).

Event Chart 1.Marine, deltaic and fluvial organic rich deposits. Some coaly units. 2.Coastal to fluvial clastic units. 3. Local clay levels interbedded with potential reservoirs; fine- grained volcaniclastic deposits.

Highlights Basin typePiggyback-Collision-Related Basin area12,823 km2/ Available area12,823 km2 Drilled wells5 Maximum thickness of the sedimentary sequence > D seismic lines968 km Source rock Cretaceous-Eocene shales (kerogene type II and III) Reservoir rock Paleogene sandstones and conglomerates Seal rockPaleogene shales Hydrocarbon typeOil and gas

Prospectivity Late Cretaceous-Eocene organic rich (type II and III) potential source rocks. Paleocene-Miocene sandstones and conglomerates with good porosity and permeability. Favorable geometries for hydrocarbon accumulation, fault propagation folds, stratigraphic wedging and lateral closures against normal and inverse faults. CBM exploration opportunities related to Paleogene coal beds.

ANH studies. Gravimetric Anomaly Map

Future ANH Exploratory Programs VALLE DEL CAUCA 2D SEISMIC PROGRAM. 250 Km approximately. Recovery of 5160 meters of cores and electric logs: geochemical, petrographic, petrophysic and biostratigraphic analysis in the cores.

Manager Gustavo Hincapié J. Administrative coordinator Elvira Cristina Ruiz Advisor José María Jaramillo Cartography-Stratigraphy-Structural Geology José Vicente Rodríguez and Hermann Bermúdez Assistant: Johanna Méndez Seismic Interpretation Sandra Milena Ortiz, Juan Guillermo Restrepo, Juan Pablo Marín Petrophysics Juan Guillermo Restrepo Geochemistry-Prospectivity Roberto Carlos Aguilera CALDAS UNIVERSITY TEAM